This is not the only equation to be immortalized in a limerick. There's also this old chestnut. It
relies on pronouncing the letter z as "zee" (rather than "zed",) as well as reading "log base e" (usually spelled "ln") for "log".

The integral z2 dz
From one to the cube root of three
All times the cosine
Of three pi over nine
Equals log of the cube root of e.

This equation also holds true.

There's also this classic from Lewis Carroll which waxes a bit philosophical:

Yet what mean all such gaieties to me
Whose life is full of indices and surdsx2 + 7x + 53
= 11/3.